The sensor built into Google’s experimental contact lens takes a new reading every few seconds. If their glucose level is dangerous, a tiny LED light flashes, warning users that their glucose level has passed a certain threshold.

Google is currently working with the FDA to get their prototype contact lens approved. According to TechCrunch, Microsoft also showed off a similar product recently.

A product like this is probably still years away from actually existing.

Finding the right partners to bring something like this to market is important if it’s ever going to exist. Since Google is such an influential company, if anyone’s going to bring a seemingly crazy concept like this to store shelves, it’s Google.

Also, could this whole “smart” contact lens concept be the future of Google Glass? The broad idea behind Glass is great, but regardless of how you look at it, Google Glass makes you look ridiculous. A contact lens is far less obtrusive and could help move the idea of wearable technology into the mainstream.